Arizona-based geologist George Gehrels has ... Gehrels is gearing up to produce a geologic map of the area with some scientists with the Alaska State Survey. He said that map could be useful ...

Six new Arizona Geological Survey maps show these hazards in southern Arizona, including study areas east of Picacho Peak. Dozens of earth fissures have been reported in the area. No human deaths ...

Making use of drones for the first time, the Arizona Geological Survey (AZGS ... The AZGS was instructed to map such fissures ...